TM 5-4310-367-14
Table 1-1. Compressor Repair and Replacement Standards
Mfr's Dimensions and
Maximum Allowable
Desired Clearance
Tolerances in
Wear and Clearance
in Inches (cm)
Inches (cm)
Components
in Inches (cm)
Maximum
Minimum
Maximum
Minimum
Cylinders:
2.650
0.0417
0.0158
2.630
2.625
Bore, low pressure
(6.731 )
(0.040)
(6.680)
(0.106)
(6.668)
1.775
0.0427
0.0169
1.760
1.750
Bore, high pressure
(4.508)
(0.108)
(0.043)
(4.470)
(4.445)
0.0010
Bores, out-of-round
(0.0030)
Crankshaft:
0.0028
0.0008
0.9995
0.9990
Journal (rod) size
(0.0071)
(0.0020)
(2.539)
(2.537)
0.0010
Taper
(0.0030)
0.0010
Out-of-round
(0.003)
0.007
0.007
0.000
End play
(0.018)
(0.018)
I
Piston to Cylinder:
2.605
0.0158
0.0417
2.6205
2.620
Low pressure, skirt
(0.1059
(0.0401)
(6.617)
(6.6561)
(6.655)
1.720
0.0427
0.0169
1.745
1.740
High pressure, skirt
(4.369)
(0.1084
(0.0429)
(4.432)
(4.420)
Piston Ring Gap:
Low pressure
0.018
0.013
0.005
0.013
0.005
Compression
(0.033)
(0.046)
(0.013)
(0.033)
(0.013)
0.062
0.055
0.015
0.055
0.015
Oil
(0.157)
(0.140)
(0.140)
(0.038)
(0.038)
I
I
High pressure
0.018
0.013
0.005
0.013
0.005
Compression
(0.046)
(0.01 3)
(0.033)
(0.033)
(0.01 3)
0.062
0.055
0.015
0.055
0.015
Oil
(0.157)
(0.140)
(0.038)
(0.140)
(0.038)
1-3
